MESON Chess Problem Database

Problem Display
PID: 256860 (2B5/4p1BK/1p2N2p/5k2/2q3b1/Q2P4/4P3/8 w - - 0 1)

Ferber, Eugene

Wiener Schachzeitung, 1902

2B5/4p1BK/1p2N2p/5k2/2q3b1/Q2P4/4P3/8

#2

7 + 6

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.e4#
    • 1...Qb3
      • 2.e4#
    • 1...Qxd3
      • 2.Qxd3#
    • 1...Qb5
      • 2.e4#
    • 1...Qa6
      • 2.e4#
    • 1...Qc1
      • 2.e4#
    • 1...Qc2
      • 2.e4#
    • 1...Qc3
      • 2.e4#
    • 1...Qc5
      • 2.e4#
    • 1...Qc7
      • 2.e4#
  • Tries
    • 1.Qc5+?
      • 1...Qd5
        • 2.Qxd5#
        • 2.e4#
      • 1...Qxc5
        • 2.e4#
      • 1...bxc5!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Sd4#
      • 1...Qxd3
        • 2.Qf4#
      • 1...Qxe6
        • 2.e4#
      • 1...Qxc1
        • 2.e4#
      • 1...Qd4
        • 2.Sxd4#
      • 1...Qf4
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(a);N_GUARD::P(A)
    • Q(a);OGATE,XP(C)::QAB(B),XQ(a)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • Q(a);XQ(B)::P(A)
      • Refutation
        • P(d);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • B(G)+S(D),DCHECK
    • Vars
      • Q(a);N_GUARD,XP(C)::QAR1(B)
      • Q(a);N_GUARD,P_SPINQ(a),XS(D)::P(A)
      • Q(a);N_GUARD,XQ(B)::P(A)
      • Q(a);::B(G)+S(D),DCHECK,XQ(a)
      • Q(a);N_GUARD::QAR1(B),XQ(a)
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